Senior Full-Stack Software Engineer

Job Description

Job Description

DNSFilter's mission is to protect our customers and partners with products they love to use! We are revolutionizing network security by providing fast, accurate, and reliable threat protection and content filtering. We're a rapidly growing company dedicated to creating a safer internet for businesses and organizations worldwide. Leveraging AI-driven threat intelligence, DNSFilter empowers our customers to proactively block threats before they impact their networks. We foster a collaborative, innovative, and results-oriented culture where every team member contributes to our mission of making the internet safer.

As we continue our product-fueled growth by adding new features and broadening our solution to meet the needs of the global market, it's clear there's a missing piece. That's where you come in!

We are looking for a full-stack software engineer specializing in React and NextJS development. As a full-stack software engineer, you will work closely with our Engineering Organization team to modernize our application and convert it to our new design system. We're looking for someone with a track record of delivering high-quality code who can work effectively in a fully remote environment. We are following lean development practices, focusing on delivering quality products in a timely manner.

This is a full-time role. Eligible candidates have and can work successfully in a small to mid-sized fast-paced, hyper-growth, SaaS start-up or scale-up, can work full-time ET hours, and are located in the United States or Canada, with a preference for candidates who can work a hybrid-office position in our Westchase, Florida office.

We recognize that people come with a wealth of experience and talent beyond just the technical requirements of a job. If you feel like this job is for you, please apply. We believe diversity of experience and skills, including transferable skills, combined with passion, is a key to innovation and excellence; therefore, we encourage people from all backgrounds to apply to our positions!

In this role, you will:

• Be a member of our Engineering organization working on the front and back end of our software application (React, NextJS, MUI, Golang, Ruby, .NET)
• Work closely with other engineers, the UX team, and other stakeholders to build modularized solutions using our new design system
• Deliver real business value to our customer base
• Expand your knowledge on all technologies within our ecosystem
• Use AI to accelerate your learning and productivity, and an advocate for AI throughout the department

To qualify for this role, you have:

• 5+ years of experience working with Golang, Ruby, .NET, C# or something similar
• 2+ years of experience developing and maintaining JavaScript, React and Redux code
• Experience building microservices or RESTful API's
• Experience building reusable components
• Proven ability to leverage AI tools (e.g., GitHub Copilot, Cursor, LLMs) to accelerate coding, debugging, and unit test generation while maintaining high standards for security and performance
• Experience integrating AI into the broader SDLC—including documentation, PR summaries, and architectural prototyping—to significantly reduce "time to context" and repetitive overhead
• Maintains a "human-in-the-loop" approach to critically audit AI-generated outputs for hallucinations and suboptimal patterns, while mentoring others on responsible AI usage
• Experience with Material UI (
• Knowledge of transforming old designs from Tailwind CSS to Material UI (MUI)
• Experience using React Query to optimize searches and cache data
• Attention to detail while converting UX designs to a working application
• You will have an API-first mindset, developing components and services that are consumed via interfaces and API contracts
• Experience with PostgreSQL, Redis, Kafka, ClickHouse, and other data stores
• Working knowledge of AWS and EKS
• Experience working remotely under minimal supervision
• The ability to keep work hours that mostly overlap with 9a-5p Eastern, M-F

Bonus points for:

• Knowledge or experience with other programming languages, specifically TypeScript, Next.js
• Knowledge of feature flag management tools such as LaunchDarkly
• Experience working with multiple distributed teams
• Experience building a security product
• Excellent documentation skills
• Awareness of AppSec, OSS licensing, and security tools
• An understanding of computer networking protocols and DNS

We Offer:

• Pathway to promotion to additional organizational positions and responsibilities based upon results and performance, not just time in the chair. You help us grow, and we will help you grow.
• Passionate and intelligent colleagues who work hard and have a good time doing it
• Paid company-wide week off at the end of each year
• Flexible Vacation Policy
• Awesome company swag
• Full medical, dental, and vision benefits for US, UK, and Canada-based employees
• Full short-term disability and life benefits; available long-term disability
• Retirement savings account options with vested company matching for qualifying employees
• In-person annual gatherings. Last time we all spent a week on a beach in the Dominican Republic!

DNSFilter is a pay-for-performance organization, which means there is an opportunity to advance your compensation based on performance over time. The hiring base pay is dependent on several factors, including level, function, training, transferable skills, work experience, business needs, and geographic location. As a hybrid company, our compensation reflects the cost of labor across several U.S. and global geographic markets. We pay differently based on those defined markets. Our Talent Team can share more about the specific salary range for the job location during the hiring process.

DNSFilter participates in the E-Verify program.

At DNSFilter, we utilize sophisticated software and tools to identify and eliminate Deepfake candidates. This approach helps us maintain the integrity of our hiring process, ensuring that we select the most qualified and genuine individuals to join our team.

U.S. hiring salary range

$125,000—$135,000 USD